The fourth lightweight champion in the UFC's history is undoubtedly the most understated, but that only adds relevance to the question: How good can Frankie Edgar get?

A wrestler by trade, dating all the way back to his collegiate days, "The Truth" was originally turned down for a place on The Ultimate Fighter, only to soon realise that president Dana White had far greater plans for the man from New Jersey.

Edgar was thrown into his UFC debut a month later against another pocket rocket, Tyson Griffin, producing one of the fights of the year. Griffin locked on a memorable kneebar towards the end of the bout, but Edgar survived to claim his first UFC victory.

A skilled jiu-jitsu practitioner under Ricardo Almeida, Edgar rapidly developed all sides of his game at the Renzo Gracie Combat Team, and after six wins in seven UFC appearances it was impossible to ignore the frequent Fight of the Night winner.

Victory over Sean Sherk, courtesy of an exhaustive work rate, confirmed Edgar as a top contender, and a further win over Matt Veach landed him the title shot he had craved.

With BJ Penn standing in his way, Edgar walked into the biggest fight of his life as one of the greatest underdogs in UFC history. However, much like the Sherk fight he outworked Penn for five rounds, mixing well-versed kickboxing skills with his wrestling base to claim the UFC gold.

Still the appropriate credit did not come the way of the new champion though, so Edgar had to repeat his heroics over Penn four months later. Still considered the underdog, Edgar delivered a repeat performance, this time dominating Penn to rubber stamp his status as the UFC's new lightweight king.

The best was still to come though as Edgar, having recovered from a beating to draw with Gray Maynard in January 2011, successfully defended his belt in the rematch, which saw him survive one of the all-time UFC hammerings before knocking out Maynard in round four. Dana White was later prompted to label Edgar the No. 2 pound-for-pounder in the world.

However, Edgar could not live up to that hype at UFC 144 in a tight decision loss to Ben Henderson, which was repeated in a rematch at UFC 150. Few would back against him regaining UFC gold in the future, although his drop into the featherweight ocean in an attempt to become a dual-weight champ came up short in defeat to Jose Aldo.

Career high
Victory over BJ Penn just was not on the cards. Edgar's strong suit was wrestling, but Penn had not been taken down by a lightweight for six years. The Prodigy's stand-up was also known to be the most devastating in the 155lb division, yet he could not land on the waspish Edgar in a brilliant display of mixed martial arts.

Career low
Believed to be on the cusp of being recognised as the best lightweight to ever grace the UFC, Frankie Edgar needed a win over Ben Henderson at UFC 144. His same wasp-like style was on show, and president Dana White even thought he won the fight, but Henderson took his title by decision - leaving Edgar demanding a rematch.

Quote
"I put a lot of work into this. It's midnight right now and I left my house at 5:30 in the morning and I won't be home until after midnight. I work hard and I think I deserve it."

Trivia
If Frankie Edgar could meet one person, it would either be Kanye West or Bruce Lee